Nonleptonic three-body charmed baryon weak decays with H(15)

We study the nonleptonic three-body charmed baryon weak decays of Bc - BnPP' under the SU(3)F flavor symmetry, where Bc denotes the antitriplet charmed baryon, comprising (e0c, -e+c , A+c ), and Bn and P(P') represent octet baryon and pseudoscalar meson states, respectively. In addition to 12 parameters from the contributions of the color-antisymmetric part of the effective Hamiltonian, denoted as H(6<overline>), there are 4 parameters from the color-symmetric one, H(15), which were not included in the previous study. With 16 parameters in total and 28 experimental data points, we obtain the minimal chi 2 over degree of freedom of chi 2/d.o.f = 1.5, which is a great improvement comparing to that without H(15). With the better fitting values, we evaluate the branching ratios and up-down asymmetries of Bc - BnPP', which present some interesting results such as B(A+c - (e(1690)0 - E+K-)K+) - (1.5 +/- 0.4) x 10-3 and potential SU(3) breaking effects in e+c - p pi+K- and A+c - E+pi-K+ to be verified by the experiments at BESIII, Belle-II, and LHCb.